Umbrella



FIG. 1 is a bottom view of an umbrella in accordance with the present invention;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side perspective view thereof;

FIG. 5 is a top perspective view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a top view thereof. 

The ornamental design for an umbrella, as shown. 